The demand for bottled water increases during the hurricane season in Florida. The operations manager at a plant that bottles drinking water wants to be sure that the filling process for 1-gallon bottles (1 gallon is approximately 3.785 liters) is operating properly. Currently, the company is testing the volumes of 1-gallon bottles. Suppose that a random sample of 75 one-gallon bottles is tested. Find the 95% confidence interval estimate of the population mean volume. The measurements are recorded in the data file Water.
Answer to relevant QuestionsAssume a normal distribution with known population variance. Calculate the width to estimate the population mean, m, for the following. a. 90% confidence level; n = 100; σ2 = 169 b. 95% confidence level; n = 120; σ = 25 A process produces bags of refined sugar. The weights of the contents of these bags are normally distributed with standard deviation 1.2 ounces. The contents of a random sample of 25 bags had a mean weight of 19.8 ounces. ...Calculate the width for each of the following. a. n = 6; s = 40; α = 0.05 b. n = 22; s2 = 400; α = 0.01 c. n = 25; s = 50; α = 0.10 A random sample of 10 economists produced the following forecasts for percentage growth in real gross domestic product in the next year: 2.2 2.8 3.0 2.5 2.4 2.6 2.5 2.4 2.7 2.6 Use unbiased estimation procedures to find ...Of a random sample of 250 marketing students, 180 rated a case of résumé inflation as unethical. Based on this information a statistician computed a confidence interval extending from 0.68 to 0.76 for the population ...
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